McKenzie method
![Robin Anthony McKenzie](https://upload.wikimedia.org/wikipedia/commons/7/77/Robin_Anthony_McKenzie.jpg)
McKenzie exercises involve spinal extension exercises, as opposed to Williams flexion exercises, which involve lumbar flexion exercises. Provided by Wikipedia
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6by Vladykov, Vadim D (Vadim Dmitrij), 1898-1986, Vladykov, Vadim D (Vadim Dmitrij), 1898-1986Other Authors: “...McKenzie, Robin, 1931-2013...”
Published 1935
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